Have you encountered a CORS problem? How did you solve it?
Middle+
233
Frontend
6261
681
How did you optimize backend queries? What is debounce and throttle, and how do they differ?
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187
What will be displayed in the console after pressing the button (re-render)?
Middle+
162
How do you optimize in React?
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156
The user sees a white screen before styles load. How to fix the problem?
Middle+
149
Practical task: write a TypeGuard to determine the type of animal (Dog or Cat)
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147
What will be displayed in the console during the first render of a React component with a child component (useLayoutEffect, useEffect)?
Middle+
145
What mechanisms cause a component to re-render in React?
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141
Were there any bugs with memory leaks or application lag? How would you analyze the problem?
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136
How does a browser work when rendering a page? What stages does it go through?
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126
Tell about your current workplace and what you do?
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124
Are you familiar with SSE (Server-Sent Events)?
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124
Practical task: implement a debounce function.
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123
Have you implemented authorization? How did you work with tokens?
Middle+
114